Electric starting-motor switch



Nov. 10,1925. 1,560,580

H.- L. JOYCE ELECTRIC STARTING MOTOR SWITCH Filed F613. 14, 1925 MIKE/1170f? HAROLD JOYCE .JTTUB/VEY is a description,

Patented N... 10,1925.

UNITED. .STA

TES PATENT OFFICE.-

- .nAnoLn L. JOYCE, or sou'rn omen, NEW JERSEY, ASSIGNOR 'ro TIFFANY MANU- FAGTUBING 00., F NEWARK, NEW JERSEY.

ELECTRIC STARTING-MOTOR SWITCH.

Application filed February South Orange, in the county of Essex, State 1 of New Jersey, have invented certain new and useful'lmprovements in Electric Starting-Motor Switches, of which the following reference being had to the accompanying drawing, and to the figures of reference marked thereon.

' 'This invention relates to an electrical switch particularly adapted for use in connection with an electric starting motor used on internal combustion engines in automofive vehicles, although, it is to be understood that the switch is adapted for other uses where an electric circuit is to-be controlled. It is the principal object of my invention to provide a switch that will make and keep a large contact area and good electrical contactduring the period of time that the electrical circuit is closed through the switch.

Another object of my invention is to provide a switch that is sturdy and rugged and one that will therefore, stand a lot of abuse, at the same time.

A further object is to provide a switch that is cheap and economical-to manufacture.

,These and other objects will be apparentfrom a study of the drawing taken in connection with the specification in which Figure 1 is an elevati-onal view, partly in section, of the switch.

' Figure 2 1s a new of the bottom part of the cover showing the movable switch memher in position.

Figure 3 1s a plan view looking down on vthe box portion of the switch showing the stationary contacts in position.

Figure 4 is the bottom view of the cover, but with the movable, switch member removed.

Figure 5 is a perspective view of the guiding member used in connection with the movable switch member.

Referring now to the details wherein like 7 numbers refer to corresponding parts in the various views, 1 is the body or box portion of the switch havingestationary contacts 2 and 3 mounted therein but insulated therefrom. The contacts 2 and 3 are preferably of copper and terminate in threaded ends on the exterior of the box; nuts 4 being provided for locking the terminals in position.

14, 1925. Serial No. 9,162.

purpose which will be more clearly understood on reading the description of the movable contact member. The box 1 has a flange 5-with mounting holes 6 therein. Fitted to the flange 5 is a cover 7 having a plurality of cars or projections 8, four being indicated, which are adapted to be bent over the flange 5 to hold the cover in position on the box portion of the switch. To the cover 7 is attached a stem 9, the same being held thereto by a plurality of fingers 10 which are riveted or clenched over within a slightly upward depressed portion 11 in the cover. The cover is also provided with a pair of slots 12 that open through the cover within the interior of the stem 9. These slotsv 12 are for the purpose of receiving the fingers 13 on the guide member 14: which has a hole 15 to receive preferably a shouldered end of the plunger 16 carried within the stem 9 and provided with a cap 17 which is preferably fastened securely to the upper end of the plunger. A spring 18 serves to hold the plunger in retracted position as shown in Fig. 1. Positioned on the inner end of the plunger and adj acentthe guide member 14, is a spring contact member 19; A suitable insulator or insulator 20 acts to insulate the spring contact member 19 from the guide member 14 and the plunger 16. The insulators are also constructed so that the projections 21 of the guide member will not come in contact with the sides of the spring member 19, but engage the insulator 20 so as to prevent the spring contact member 19 from turning on the plunger 16 and the plunger itself is prevented from turning through the cooperationof the fingers 13 and the slots 12. The spring member 19 is preferably constructed of a plurality of leaves which may be of diiferent material. However, the leaf that engages the contacts 2 and 3 I preferably make of copper and at- I tach the extreme end thereof to the other leaf or leaves by bending the end 22 over the other leaf or leaves, preferably in a slot 23-provided in the other leaf or leaves. The contact member 19 has a straight portion as shown in Fig. 1 against which, the insulator 24L rests on one side and the insulator 20 and the plunger 16 being preferably rivetedover .a

guide member 14 on the-other; the end ofbut insulated therefroni,a cover for-the box,

as at 25 thereby holdingthe spring member positioned within the stem and having a cap that variousdetails may be mo ,on' the contact members 2 and 3, but retain the contact member ing contacts, "as shown, a wiping action'is 1 teixinating ,inj ends withoutany cutting actio described is made almost entirely of punched and the SP1" members which adds to the silient spring" having a straight portion 19 securely to the plunger. Themember 19 extendingoverthe end of the stemyand a has both ends formed in a reversed curve as spring within the stemto"re turn the plunger is clearly shown in- Fig. 1. So that the ends after actuation; a multiple leaf contact of the member 19 may lie substantiallymember having a flat portion and its ends parallel to the faces of the contacts '2 and formed in reverse curves with means for en-pressure applied to the plunger, fastening the leaves together at their tip pushing the same downward, the'reversed ends,"means'fonmaintaining said contact stein extending from said cover, a plunger,

curves in the member 19, produce a-result member in proper angular relationship to such that the ends of the springs do not tilt said box, contacts and means for attaching and saidmaintaining their "full contact area. This I consider tomeans to the plunger. .be a unique feature-in my switch construc- .3. In a" switch of the class described, a tion, since the contact resistance is reduced to movable contact member comprising; a rea minimum and by arranging the cooperatsilient spring having obtained thereby insuring clean fcontacts cu cs,- as is present in tached e switch herein for preventing ,t-he plunger from turning a, plunger having .said spring atmany types of switches. T

lightness of the cover and stein for-supporting the plunger, switch, 'at the same time giving a switch a box to whichsa'id cover is attached, a pair which is rugged and substantiaL' ofcontacts mounted-on theiwall of thebox I While I have shown a preferred form of so that their faces are inclined in opposite to it' on' said straight portion, means a straight portion formed in reverseg turning on the plunger, a

niy invention,fit will be readiiiyfiobserved direction and'substantially parallel to the-' i ed withengagement portions of said spring. out departing from the spirit of the'inven- 4. Ina switchof the class" described, intion or the scope of the appended claims; cludinga box, cover, stem, cap and return Having thus described my invcntionwhat spring 'within the stem; a pair of contacts I claim is: i, positioned withiii'th'elbox so their faces are '1. Ina switch of the class described, a oppositely inclined to each other, a sprin movable contact member comprising; a re-' contact member and a guide member carried on thevend' of-the plunger, the contact memterminating ends formed in reverse, curves, the; end beyond the second reverse having its ends formed ii -reverse curves so curve having a substantial length 'forengag-" as to insure a 'wiping and full area engageing a contact, a plunger having said'jspring :ment with said box contacts. attached to it ,on said straight portion, a .5. In a switch, a. pair of stationary-conide member fastened to the plunger and tacts positioncdjso their faces are oppositel l i iiving projections for preventing the spring inclined toeach other, a} movable switc turning on the plungeig'a cover and stem member for bridging said contacts compristhe fingers. on "ing; a"resilent metallic member having aflat for supporting the plunger,

toward said guide member extending through'the portionterinina'tingin parts inclined cover atpoints spaced from, said plungereach other, 0 eniiig in'tothe stem for preventing the bent away p ungerfromturning ai box to which t1ally;parallel to said stationary contact cover is attached anda air of contactsposi e-faces whereby'a smooth wipi tioned in the box 'so the contact engaging non-wedgi'iig contact is obtain part of said spring may'make substantial foractuating the iswitchmember parallel contact-therewith. tosaid'flat portion. 7' 2. Ina switch of theclass described, a .box In member having a pair of .contactsset at an tiire. angle to each other in the wall of the box and means said parts terminating in ends from each other", and substanfull area, I

attached testimony. whereof,.lI aflix my signajilIAROL1 ).L."JOYCE. 

